Displaying report 1-1 of 1.
Reports until 12:01, Friday 17 July 2015
H1 ISC
jenne.driggers@LIGO.ORG - posted 12:01, Friday 17 July 2015 - last comment - 17:36, Friday 17 July 2015(19709)
H1 better low freq performance

Matt found some data from last night that looks pretty good - I'm not sure what the state of the IFO was at this particular time, so I won't say.

Images attached to this report
Comments related to this report
gabriele.vajente@LIGO.ORG - 13:04, Friday 17 July 2015 (19711)

Brute force coherence report for this perod can be found here:

https://ldas-jobs.ligo.caltech.edu/~gabriele.vajente/bruco_1120811417/

sheila.dwyer@LIGO.ORG - 15:38, Friday 17 July 2015 (19713)

Our NOMINAL_LOW_NOISE state now includes BS coil drivers swtiched,  SRCL and MICH FF.  A2L coefficients were tuned before the vent but not carefully since then.  We also had the ISS 2nd loop on at this time that helped the noise around 300 Hz. 

rana.adhikari@LIGO.ORG - 17:36, Friday 17 July 2015 (19721)

we have seen that low frequency noise breathe somewhat; the noise was already low aroun 70 Hz when we switched on the SRC FF (the old filters). We have taken a few measurements with better coherence and with better fitting code and will soon get a bit more subtraction. The high frequency noise is less good than the best mysteriously. The DARM offset was giving us 20 mA total OMC DC current. We did not succeed yet in being stable at higher offsets.

Displaying report 1-1 of 1.